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Chapter V Common Trouble and Its Elimination
Different vehicles, different configuration, please check the following information according to the
actual configuration of the vehicle, the common faults and troubleshooting methods can be used for
reference. If you encounter a practical problem that is not clear or can not be resolved, please contact
our after-sales personnel immediately.
1. Engine common trouble and its elimination (suitable for diesel engine)
Diesel engine can not start
Possible causes
Remedies
1
）
Too low starting speed
1) Check the starting system and assure the starting speed is not lower
than 110rpm.
2) Air exists in the injection system
2) Check the looseness of the joints of the feed line. Unscrew the
de-aeration bolt on the fuel cleaner and oil water separator assembly,
then press fuel with hand priming pump until the fuel overflows without
air bubbles.
3) Fuel pipe clogged
3) Determine the location of the clog and clear it.
4) Fuel filter choked
4) Replace the screw-on filter element of the fuel filter/oil-water
separator assembly.
5) Fuel supply pump does not apply fuel
or applies fuel irregularly
5) Check for leakage in the fuel inlet pipe
Clogging of the fuel supply pump filters and fix or replace.
6) Insufficient fuel injection, without fuel
injection or low injection pressure
6) Check the injector atomization situations and replace a new one if it
doesn’t work.
7) Starting system problems:
7) Check the connection to be correct and reliable.
Incorrect terminals connection or bad
contact;
Insufficient battery charge;
Charge the battery.
Bad contact between the brush and
communicator of the starter
Repair or replace the brush and clean the surface of the communicator
with soft sand paper and blow off.
8) Insufficient compression pressure;
8) Replace the piston ring and press in the cylinder sleeve if necessary.
Piston ring worn-out
9) The fuel cut off solenoid valve joint is
loose, dirty or corroded smudginess canker
10) Mounting timing incorrect
9) Check the valve clearance, valve spring, valve stem, and valve seat.
Grind the valve seat if necessary.
Tighten and wash or replace.
10) Check and adjust it.
